widgetlocker is pretty sweet. and now there are TONS of themes for it and super easy to change between them. widgetlocker is one of those apps that i will never go without.
however, they only have sliding options. they have AOSP sliders, droid x sliders, iphone slider and sense slider. they dotn have a "move picture" option per-se. it is def. worth the $3 or whatever it is.